var MongoClient = require('mongodb').MongoClient;
var url = "mongodb://localhost:27017/";
let conn = null

function getCollection(collecitonName) {
    return new Promise(
        (resolve,reject)=>{
            if(!conn){
                MongoClient.connect(url, function (err, db) {
                    if (err) throw err;

                    conn = db.db("TVseries");
                    resolve(conn.collection(collecitonName))
                });
            }else{
                resolve(conn.collection(collecitonName))
            }
        }
    )
}

module.exports = {
    getCollection
}